Prolapsed hyperplastic gastric polyp: an uncommon cause of acute pancreatitis.

A 68-year-old male presented to the Emergency Department with a one-month history of intermittent epigastrium pain. Laboratory tests revealed leukocytosis and elevated lipase (4129 UI/l), with normal liver function, so he was admitted for its first episode of acute pancreatitis. Abdominal ultrasound showed liver steatosis, without cholelithiasis or bile duct dilatation. A thoraco-abdominal computed tomography was performed, revealing a pedunculated gastric polyp in lesser curvature measuring 64x38mm with no evidence of metastatic disease. Gastroscopy was performed, showing a 7-cm pedunculated gastric polyp prolapsed through the pylorus into the duodenum. The polyp was moved into the stomach, and a fragmented resection of the polyp was carried out with a hot snare. Histopathologic evaluation was compatible with hyperplastic polyp with low-grade dysplasia. The patient had a favourable evolution with no complications after the procedure.